Chapters1-3. Chapters4-5. Chapters 7-8. Chapter 9. Chapter 10. 1pt. 1 pt. 1 pt. 1pt. 1 pt. 2 pt. 2 pt. 2pt. 2pt. 2 pt. 3 pt. 3 pt. 3 pt. 3 pt. 3 pt. 4 pt. 4 pt. 4pt. 4 pt. 4pt. 5pt. 5 pt. 5 pt. 5 pt. 5 pt.
What is the percent yield of the reaction if 9.9g 2Pb(No3)2 are heated to giver 5.5g of PbO?
2Pb(NO3)2(s) @PbO(s) + O2(g)
What is 82 %
12.7g Cu produced 38.1 g Ag. What is the percent yield of sliver in this reaction? Cu+2AgNO3Cu(NO3)+ 2Ag
What is 88.2%
According to the kinetic theory, collisions between molecules in a gas ____.
A) are perfectly elastic
B) are inelastic
C) never occur
D) cause a loss of total kinetic energy
What is Perfectly Elastic
Which of the following statements is part of the kinetic theory?
The particles of a gas move independently of each other.
The particles in a gas move rapidly.
The particles in a gas are relatively far apart.
all of the above
What is all of the above.
Which of the following statement is not true, according to the kinetic theory?
There is not attraction between particles of gas.
Only particles of matter in the gaseous state are in constant motion
The particles of a gas collide wit each other and with other objects
All of the statements are true
What is Only particles of matter in the gaseous state are in constant motion.
What instrument is normally used to measure atmospheric pressure?
What is a Barometer
What is the SI unit of pressure?
What is Pascal
Standard conditions when working with gases are defined as __?
0 K and 101.3 kPa
0 K and 1 kPa
0 C and 101.3 kPa
0 C and 1 kPa
What is 0 K and 101.3 kPa
What causes gas pressure in a container such as a helium balloon?
The walls of the container
The vacuum maintained in the container
The simultaneous collisions of fast-moving particles in the container
Atmospheric pressure acting on the outside walls of the container
What is the simultaneous collisions of fast-moving particles in the container
With which temperature scale is temperature directly proportional to average kinetic energy?
What is kevlin
How is the ideal gas law usually written?
B) PV = nR
C) PV = nRT
D) P = nRT
What is PV= nRT
Which law can be used to calculate the number of moles of a contained gas?
combined gas law
ideal gas law
What is ideal gas law
What happens to the partial pressure of oxygen in a sample of air if the temperature is increased?
It stays the same
the change cannot be determined
What is it stays the same
Which of the following gases will effuse the most rapidly?
What is hydrogen
Which of the following atoms would have the greatest velocity if each atom had the same kinetic energy ?
What is ammonia
Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time?
What is oxygen
What causes waters low vapor pressure?
A) dispersion forces
B) covalent bonding
C) hydrogen bonding
D) ionic attractions
What is hydrogen bonding
What is the shape of the water molecule?
C) trigonal planer
What is bent.
Which of the following is primarily responsible for holding water molecules together in the liquid states.
Polar covalent bonds
What is hydrogen bonds
Surface tension is ___?
Is the inward force which tends to minimize the surface area of liquid
may be increased by detergents
Is decreased by hydrogen bonding
causes beads of water to spread out.
What is the inward force which tends to minimize the surface area of liquid
The fact that ice is less dense than water is related to the fact that ___?
A) the molecular structure of ice is much less orderly than that of waterB) the molecules of ice are held to each other by covalent bonding
C) ice has a molecular structure in which water molecules are arranged randomly
D) ice has a molecular structure that is an open framework held together by hydrogen bonds
What is the molecular structure of ice is much less orderly than that of water
What is the number of Kg of solvent in a molar solution containing 5.0 grams of solute? (Molar mass = 30g)
What is 0.24k
To which of the following variables is change in a boiling point directly proportional?
Morality of solution
molality of solution
percent by volume of solution
percent (mass/mass) of solution
What is percent volume of solution
What is the freezing point of a solution of 0.5 mol of LiBr in 500 mL of water? (Kf=1.86 C/m)
What is – 1.86 C
What is the molality of a solution of water and KCL if the freezing point of the solution is -3 C? (Kf=1.86 C/m; molar mass of water =18 g)
What is 1.2 m